*::after,
*::before {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: #0a3643;
  overflow: hidden;
}

.pulse {
  position: relative;
  width: 200px;
  height: 200px;
  box-shadow: inset 0 0 40px #12b9ff, 0 0 50px #12b9ff;
  border-radius: 50%;
  border: 1px solid #12b9ff;
  background: url(./earch.jpg);
  background-size: cover;
  animation: animateEarth 30s linear infinite;
}

.pulse span {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: transparent;
  border: 1px solid #12b9ff;
  animation: animate 6s linear infinite;
  border-radius: 50%;
  animation-delay: calc(var(--i) * -1s);
}

@keyframes animate {
  0%{
    width: 200px;
    height: 200px;
    opacity: 1;
  }
  50% {
    opacity: 1;
  }
  100% {
    width: 600px;
    height: 600px;
    opacity: 0;
  }
}

@keyframes animateEarth {
  0% {
    background-position-x: 0px;
  }
  100% {
    background-position-x: 2400px;
  }
}